JPH0678201B2 - Potency enhancer for pyrethroid insecticidal composition - Google Patents

Description

TECHNICAL FIELD The present invention relates to an efficacy enhancer for pyrethroid insecticidal compositions.

[Prior Art] Conventionally, various sheet-like insecticides have been used against moist pests such as cockroaches. These dosage forms are generally prepared by simply treating the insecticidal active ingredient on paper, non-woven fabric, polymer resin sheet, film or laminated sheet, but for microcapsules and polymer resins. Some are kneaded and processed into sheets.

[Problems to be Solved by the Invention] However, it is a fact that these sheet-like insecticides do not have a satisfactory effect against rogue pests such as cockroaches.

The cause is that the insecticidal active ingredient used has a strong toxicity and odor, or is expensive, so that it cannot be used in an amount necessary for obtaining a sufficient insecticidal effect.

For example, organophosphorus insecticidal active ingredients are highly toxic and also have a bad odor, carbite insecticidal active ingredients are highly toxic, and pyrethroid insecticidal active ingredients are expensive, so they all have sufficient insecticidal effect. Therefore, it is not possible to produce an insecticide using the necessary amount of the insecticidal active ingredient. That is, when a large amount of the insecticidal active ingredient is used in order to develop a satisfactory insecticidal effect, problems arise in terms of safety and cost.

In view of the circumstances as described above, the present invention aims to develop a penetration aid for use in a pest insect pesticidal composition that exhibits sufficient insecticidal activity even when the amount of the insecticidal active ingredient used is small. .

[Means for Solving the Problems] The present invention uses a combination of an insecticidal active ingredient and a specific compound so that when the base material is treated with these, the base material has a large surface area with irregularities. It becomes easy to adhere to and easily comes in contact with the insect pests, and the sticking rate and absorbability of the insecticidal active ingredient to the insect pests are significantly improved.As a result, it is remarkable even when the amount of the insecticidal active ingredient used is small. It was made by finding that an insecticidal effect can be obtained, and an organic alcohol, an organic acid, an organic ester, or an organic ketone having a melting point or freezing point of 30 to 100 ° C, which has an effect of enhancing the efficacy against wisdom pests. , An organic ether, an alkylbenzene, or a lac (however, not including a wax) as an active ingredient, relates to a potentiating agent for a pyrethroid insecticidal composition.

[Example] The efficacy enhancer for pyrethroid insecticidal composition of the present invention,
When mixed with a pyrethroid insecticidal active ingredient, the adhesion rate and absorbability of the insecticidal active ingredient against the pest insects are remarkably improved, and the insecticidal effect is remarkably improved as compared with the case where the compound is not used in combination. It is a component used in.

The efficacy enhancer has a melting point or freezing point of 30 to 100 ° C., preferably an organic alcohol, an organic acid, an organic ester, an organic ketone, an organic ether, an alkylbenzene or shellac which is 30 to 85 ° C. as a main component, As shown in Examples described later, it exerts a potency enhancing action against the insect pests.

The term “main component” means that a substance that exhibits the effect as a potency enhancer even if it contains some impurities is included in the potency enhancer of the present invention.

Specific examples of the efficacy enhancer include, but are not limited to, the following compounds. These may be used alone or in combination of two or more.

Specific examples of the pyrethroid insecticidal active ingredient whose efficacy enhancer improves the permeability include, for example, pyrethrin, allethrin, permethrin, resmethrin, flamethrin, tetramethrin, phenothrin, sumicidine, phenothrin, propasulin, and empensulin. It is not limited to these. These may be used alone or in combination of two or more.

Insect insect pesticide composition is prepared from the insecticidal active ingredient and the potency enhancer. In addition to these, commonly used synergists, antioxidants, bactericides, fungicides, solvents (crystal softeners) ), Repellents, flavors, colorants and the like may be added.

Examples of the synergist include piperonyl butoxide, cinepyrine 222, and cinepyrine 500, and examples of the antioxidant include BHT, BHA, tocopherol, γ-
As a fungicide such as oryzanol and ascorbic acid,
For example, Irgasan DP-300, salicylic acid, PCMX, etc.
Antifungal agents include, for example, Preventol A ₃ , A ₄ , BC
Examples of solvents such as A and TBZ include liquid plastic plasticizers, hydrocarbons, oils and fats, liquid higher alcohols, etc.
The repellent, for example N, N-diethyl--m- toluamide, 2,3,4,5-bis (△ ₂ - butylene) - tetrahydrofurfuryl, di -n- propyl iso Cinco Melo titanate, dibutyl succinate, 2 -Hydroxyethyl octyl sulfide and the like can be mentioned, but the invention is not limited thereto.

The use ratio of the insecticidal active ingredient and the potency enhancer may be appropriately determined depending on the application target because it varies depending on the base material holding them, usually 0.05-5 g insecticidal active ingredient per 1 m ^{2 of the} base material. , Preferably 0.05 to 3 g, the effect enhancer is 0.05 to
10 g, preferably 0.1-63 is used.

Examples of the above-mentioned base material include synthetic resin sheets or films or non-woven fabrics made of polyethylene, polypropylene, polyvinyl chloride, polyester, nylon, etc., rubber sheets, synthetic papers, animal and plant or inorganic fibrous bodies. Sheets (paper, cloth, leather, etc.), mixed sheets or blended fabrics thereof, blended fabrics or non-woven fabrics of the above synthetic resins or rubbers and animal or vegetable fibers, metal foils or films of aluminum, copper, stainless steel, etc., and the above various sheets The laminated sheet and the like can be exemplified. Further, instead of the base material, a base material, a wall, a fold, etc. forming a floor, a door, furniture, etc. may be directly treated.

There is no particular limitation on the method of treating the substrate with the above-mentioned insect pesticidal composition for moisturizing insects, and any method can be adopted as long as the substrate can be treated with a predetermined amount.

As a specific example of the treatment method, for example, the pesticidal composition is dissolved in a suitable solvent, or one obtained by emulsifying and dispersing using a surfactant is impregnated into a base material, applied, and dropped,
It may be processed by a method such as printing. Of course, it is not always necessary to treat the entire substrate with the insecticidal composition,
A part of the substrate may be treated by the above method such as printing. Furthermore, the insecticidal composition as an aerosol formulation, on the floor,
You may spray on a wall surface.

The insecticidal composition-treated substrate produced in this manner is a paper that is laid under a fold or carpet when the substrate is paper,
It can be used as paper for interiors such as wallpaper, paper laid under refrigerators, furniture, closets, etc.When used as a base material that constitutes floors, walls, etc., it can be used as it is as a floor or wall. By using these treated base materials, it is possible to effectively kill the insect pests such as cockroaches with a small amount of the insecticidal active ingredient.

Next, the efficacy enhancer for pyrethroid insecticidal composition of the present invention will be described in more detail based on examples, but the present invention is not limited thereto.

Examples 1 to 79 and Comparative Examples 1 to 7 The effect of the insecticidal enhancer in the case of using the compounds (test compounds) shown in Table 1 which were solid at room temperature was examined by the following method using black croquettes. That is, the test compound 4 g / m ² ,
A square filter paper (30 × 38 cm) was impregnated with an acetone solution containing these so that permethrin was 1 g / m ² . The filter paper was set on a bat slightly larger than this paper to prevent the black cockroach from escaping, and 5 adult male and female black cockroaches were put in each and contacted with the filter paper for 10 minutes. After that, it was transferred to a breeding container that was not contaminated with chemicals, fed with water and water, and the number of lethality after 48 hours was observed. Repeated this 10 times.

The obtained results were judged according to the following criteria and are shown in Table 1.

(Insecticidal effect) ++++: 90% or more of lethality +++: 〃 70 to less than 90% ++: 〃 40 to less than 70% +: 〃 10 to less than 40% ±: 〃 to less than 10% −: 〃 less than 1% Compare As a result, when a compound that was solid at room temperature was not used, a compound that was liquid at room temperature was tested. First result
Shown in the table.

From the results shown in Table 1, when using the composition for disinfecting insect pests using the efficacy enhancer of the present invention, when a compound that is liquid at room temperature is used and a compound that is solid at room temperature is not used, It can be seen that the insecticidal effect is clearly superior to that of Ai.

Examples 80 to 89 and Comparative Examples 8 to 9 Acetone solutions containing 4 g / m ^{2 of} the test compound shown in Table ² and 1 g / m ² of permethrin were added to a circular filter paper (φ9c).
m) and set in a petri dish (φ9 cm). In this petri dish, 20 Jin-Sanshibushi beetles were placed and contacted for 10 minutes. After that, it was transferred to a breeding container that was not contaminated with the drug, feeding was performed, and the number of lethality after 48 hours was observed. this
Repeated 10 times.

The obtained results were judged according to Table 1 and the criteria, and shown in Table 2.

Examples 90 to 95 and Comparative Examples 10 to 11 2 parts (parts by weight, the same applies hereinafter) of the test compound shown in Table 3, 0.5 part of permethrin and lsopar E (manufactured by Esso Kagaku) 50
Parts into an aerosol container, CFC 11, CFC 12 1: 1
50 parts of the mixture were filled to give a composition in the form of an aerosol.

The obtained aerosol was applied to a veneer plate (30 × 38 cm) so that the same amount as in Example 1 was applied. After the solvent was volatilized, the insecticidal test against the German cockroach was performed 10 times in the same manner as in Example 1.

The obtained results were judged according to Table 1 and the criteria, and shown in Table 3.

Example 96 and Comparative Example 10 4 g / m ² of the test compound shown in Table 4 and the insecticidal active ingredient shown in Table 4 (allethrin, resmethrin, tetramethrin,
Phenothrin) 1 g / m ^{2 The} mixture containing these was treated on square filter paper (30 × 38 cm), and the insecticidal test against black cockroach was conducted 10 times in the same manner as in Example 1.

The obtained results are judged according to the same criteria as in Table 1,
Shown in the table.

Example 97 2 g of cetyl alcohol, 1 g of stearic acid stearate, 0.8 g of permethrin and 0.2 g of Irgasan DP-300 (manufactured by Bayer Co.) were dissolved in 130 ml of acetone, and the resulting kraft paper (grammage 78 g / m ² , Daishowa Papermaking ( (Manufactured by Co., Ltd.) 1 m ² was processed to prepare an insecticidal sheet.

Example 98 0.5 g of myristic acid, 1 g of cinnamyl cinnamate, 0.5 g of diphenyl phthalate and 1 g of resmelin li f were dissolved in 150 ml of acetone, and this was nonwoven fabric (Mikiron MPH70, Tsubo 70 g, manufactured by Miki Special Paper Co., Ltd.) 1 m ² The entire surface was treated to prepare an insecticidal sheet.

Example 99 Carnauba wax 0.3 g, myristyl myristate 1.5 g, stearyl alcohol 0.5 g, stearyl palmitate 0.7 g,
Ciphenothrin F 0.7 g, Nikkor MYS-25 (manufactured by Nikko Chemicals Co., Ltd.) 0.3 g, BHT 0.2 g and water 35.8 g to make an emulsified dispersion, and this was made into a horilaminated paper (one side PE coated,
The paper was treated with Ryosara kraft paper and the surface of the paper having a basis weight of 50 g / m ² ) was treated and dried to prepare an insecticidal sheet.

[Effect of the Invention] Since the insecticidal effect of the insecticidal active ingredient can be enhanced by using the efficacy enhancer of the present invention, a sufficient insecticidal effect can be obtained even if the amount of the insecticidal active ingredient used is small. Therefore, it is highly safe, has little odor, and is cheap and can kill insects such as cockroaches.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-53-115817 (JP, A) JP-A-49-92235 (JP, A) JP-B 38-17700 (JP, B1) JP-B 38- 18400 (JP, B1) JP-B-45-4520 (JP, B1)

Claims (1)

[Claims] 1. An organic alcohol having a melting point or freezing point of 30 to 100 ° C., which has an effect of enhancing the efficacy against pest insects,
An efficacy enhancer for a pyrethroid insecticidal composition comprising an organic acid, an organic ester, an organic ketone, an organic ether, an alkylbenzene or shellac (but not including a wax) as an active ingredient.